Mechanical primer for guns.



Patented Aug. 6 |90I. No 579752' a. STUART.

mEcHAmcAL PRIMER Foa Guns.

(Application led Feb. 4, 1901.)

(Ho @indem UNITED STATES APAT-,ENT rlvlcis.l

' GEORGESTUART', or NEwoAs'nnn-UPoNnYNE,ENGLAND, AssIGNoR 'rosIR W; e. ARMSTRONG, WHITWORTH- a oo., LIMITED, `F SAME PLAGE.-

MEcHANioA-L PRIMER FOR GUNS.

-. f SPECIFICATION refining pars of :Letters Patent No. 679,792', dated August 6', .1901.

i" Application ne@ February 4, 1901. sesamo. 45.898. na man.)

.o Be it'known that I, GEoRE STUART, en gineer, alsubjeet'of the Queen of Great Britaim-.residing at Elswick VYorks, l \Tevcastle` uponTyn e,5England, have invented Icertain newanzl useful I m prQvements-in Mechanial Primers forUse with. Guns, of'which the following'isa specification.'

This invention has for its object improve-'- 1o ments in mechanical primers. The primers are intended for use in axial vented guns,

more especially-heavy guns, where thej'shock To insure strengthlof theV cone Vcan be regulated to 'suit tle resistance' required by increasing ordecreasing the thickness ofthe metal. The rear and smaller end of the truncated cone maybe closed and have a point extending inward from it to come in rearof the detonator and at a short distance from it, or the point might, if preferred, be carried by the striker itself andpass through a hole formed through the 3o rear end of the truncated cone. The larger forward-end of the cone may have an outwardly-extending flange around it to rest against one side of a ring by which the detonator is carried, and the ring and flange may v be held in place between a .shoulder in the hole bored through the head of the outer tubular case of the primer and a screw'- plug -screwing into the inner end of this hole. The plug has a hole throughv its center to allow 4o the explosion to pass to thecharge in the forward part of the primer-caso.

ings annexed.

Figure lis a longitudinal section, and Fig. 2 is a rear end View, of the primer. k Fig. .3 shows separately a longitudinal section of the forward end of the striker, and Fig. 4 a secvtion of the metal cone 'usedwith it. Figs. 5

and 6 show similar viewsof modified forms of n lthe striker and cone.

A is the outer tubular case, with solid rearv end, havinga hole bored through it to receive the st riker B. The head-or forward endof the striker is enlargedindiameter and has in its front end -a conical recess B.

striker. '.The disk lies in 'an enlargement of' the rear 'end of the hole bored through the rear end of the outer case, and thel enlargement is made deep enough to allow ofthe disk and striker vbeing driven av short distance forward.

C is a disk detonator of ordinaryconstruction'lying'inan enlargement of th forward 4end of the h le and held in placeby a screwplug D, screwed into this forward end.

E l'is a flanged truncated cone of thin metal interposed between thestriker andthe detonatog-disk. A E' is a iiange extending outwardly around the larger end of the` cone and entering between-the disk and the shoulder, up to which the d-isk is held by the screw-plug. The rear end' of the cone is'closed and has a pointE2 extending inwardly from this closed end.

The .explosive charge of the prixner'is con* tained within the -forward end of the case A, and this forward end is closed byja disk A.

restrainsthe striker from being thrown forward; but when the striker is forcibly driven forward-it bends. the cone and drives its point E2 against the detonator and' explodes it. y The cone then forms'a very efficient gas-check to prevent escape of gafsfroni the rear end of the primera-J In the alternative arrangement shown at Figs. 5 and 6 thepoint is carried by. the forward'end of the strikerandthe cone is formed point is to extend.

What-l claim'is-.. 1. The"combination of the outer tubular case A having a hole extending centrally with a hole in its rear end,l through 'wb ich the The improvements are shown in the draw` the forward part of this hole, the striker B' lying in the rear partof the hole and the holthe detonator.

B2 is a' disk securedto therear end of `the through its rearend, the detonator C held in low truncated cone E of thin metal interposed between the forward end of the striker and D 'isga hole bored centrally through the.l

I 8o So-long as the cone E retains its form it roo 2. The combination of the outer tubular case A having a hole extending centrally through its rear end, the striker B lying in the rear part of the hole, the detonator-disk C lying across an enlargement of the inner end ofthe hole, the thin truncated metallic cone E interposed between the disk and the striker, its ange E and the screw-plug D screwing into the inner end of the hole and serving to nip the disk` C and flange E between itself and the shoulder formed by the enlargement of the hole.

The combination of the outer tubular case A having a hole extending centrally through its rear end, the detonator C, the striker-B and the thin truncated metallic cone E interposed between the detonator and strikerhaving ils rear end closed and a strikerpoint E2 extending inwardly from this Closed end.

i. The combination of the outer tubular casezA having a hole extending centrally through its rear end,v the deto'nator-disk C, the striker-LB, the thin truncated metallic cone E closed at its renrend, the striker-point E2 projecting inwardly from this closed end, the,

recess B in the forward end of the head, vthe disk B2 xed on the rear end of the striker and lying in an enlargement of the rear end of the hole, the enlargement being made deep enough to allow of the disk and strikerfne'-A :ing driven a short distance forward, the detonator-disk C, the thin truncated metallicv "cone E, itsf'ange E and the screw-plug-D serving to nip the disk C and fia-nge E be'- tweerr itself and the shoulder formed lby the enlargement of the hole.

GEORGE STUART- Witnesses:

'F.Ponvls, L. W.`Woons. 

